Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific

Interannual dynamics of size composition, age structure, and growth parameters are considered for japanese sardine Sardinops melanostictus in context of its recent and previous blooms and mass migrations to the Pacific waters at Kuril Islands and to the northern Japan Sea. Before the post-bloom cata...

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Main Authors: V. A. Dudarev, A. I. Galeev
Format: Article
Language:Russian
Published: Transactions of the Pacific Research Institute of Fisheries and Oceanography 2021-10-01
Series:Известия ТИНРО
Subjects:
Online Access:https://izvestiya.tinro-center.ru/jour/article/view/656
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author V. A. Dudarev
A. I. Galeev
author_facet V. A. Dudarev
A. I. Galeev
author_sort V. A. Dudarev
collection DOAJ
description Interannual dynamics of size composition, age structure, and growth parameters are considered for japanese sardine Sardinops melanostictus in context of its recent and previous blooms and mass migrations to the Pacific waters at Kuril Islands and to the northern Japan Sea. Before the post-bloom catastrophic decline in the 1990s, in conditions of the highest density of the sardine population, small-sized fish with relatively slow growth rate became dominant, distinguished by lowered reproductive potential because of low population fecundity and reproduction rate. In the new, modern bloom of sardine population, two modal groups are observed in the year-classes size composition, in particular in the Japan Sea, with different exterior and biological parameters. There is assumed that they correspond with two morphological types, which alter each other at different stages of the demographic cycle, that determines total abundance of sardine population in the North-West Pacific and its long-term dynamics.
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spelling doaj.art-6d8d0769fee74642919b693fe6cff3d12025-03-02T09:31:42ZrusTransactions of the Pacific Research Institute of Fisheries and OceanographyИзвестия ТИНРО1606-99192658-55102021-10-01201356157610.26428/1606-9919-2021-201-561-576597Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West PacificV. A. Dudarev0A. I. Galeev1Pacific branch of VNIRO (TINRO)Pacific branch of VNIRO (TINRO)Interannual dynamics of size composition, age structure, and growth parameters are considered for japanese sardine Sardinops melanostictus in context of its recent and previous blooms and mass migrations to the Pacific waters at Kuril Islands and to the northern Japan Sea. Before the post-bloom catastrophic decline in the 1990s, in conditions of the highest density of the sardine population, small-sized fish with relatively slow growth rate became dominant, distinguished by lowered reproductive potential because of low population fecundity and reproduction rate. In the new, modern bloom of sardine population, two modal groups are observed in the year-classes size composition, in particular in the Japan Sea, with different exterior and biological parameters. There is assumed that they correspond with two morphological types, which alter each other at different stages of the demographic cycle, that determines total abundance of sardine population in the North-West Pacific and its long-term dynamics.https://izvestiya.tinro-center.ru/jour/article/view/656ichthyocenosispopulation dynamicsgrowth ratejapanese sardine <i>sardinops melanostictus</i>size compositionage compositionmorphological type
spellingShingle V. A. Dudarev
A. I. Galeev
Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific
Известия ТИНРО
ichthyocenosis
population dynamics
growth rate
japanese sardine <i>sardinops melanostictus</i>
size composition
age composition
morphological type
title Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific
title_full Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific
title_fullStr Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific
title_full_unstemmed Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific
title_short Interannual dynamics of size, age composition and parameters of growth for japanese sardine <i>Sardinops melanostictus</i> in periods of its high abundance in the North-West Pacific
title_sort interannual dynamics of size age composition and parameters of growth for japanese sardine i sardinops melanostictus i in periods of its high abundance in the north west pacific
topic ichthyocenosis
population dynamics
growth rate
japanese sardine <i>sardinops melanostictus</i>
size composition
age composition
morphological type
url https://izvestiya.tinro-center.ru/jour/article/view/656
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